Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur télécharger pdf (Page 34)

5 Performance Data / Operation

B−34

CP 343-1 Advancedfor Industrial Ethernet / Manual Part B

Release 06/2008

C79000-G8976-C202-04

Execution times of the FCs PNIO_SEND / PNIO_RECV

The calculation of the reaction times with PROFINET IO is determined by the

execution time of the function blocks required on the S7-300 CPU (PNIO_SEND,

PNIO_RECV).

Table 5-8

Component

Explanation / values

Execution time on the CPU

315-2DP

(6ES7 315-2EG10-0AB0)

per PNIO_SEND block call:

S < 1 ms at 240 bytes

per PNIO_RECV block call:

S < 1 ms at 240 bytes

Execution time on the CPU

317-2PN/DP

(6ES7 317-2EJ10-0AB0)

per PNIO_SEND block call:

S < 0.8 ms at 240 bytes

per PNIO_RECV block call:

S < 0.8 ms at 240 bytes

5.4.2 How PROFINET IO devices start up with a large operational

configuration

When operating the module with a large configuration (up to 48 communication

connections and up to 128 PROFINET IO devices), it may take several minutes

when the station starts up before all PROFINET IO devices have received

configuration data from the PROFINET IO controller. The IE/PB Link PN IO

operating as a PROFINET IO device is particularly affected by this.

To avoid the CPU stopping the distribution of configuration data in this situation, it

may be necessary to increase the monitoring times on the CPU (Properties dialog,

“Startup” tab).

5.4.3 Operating PROFINET IO alongside other services

Sporadically used services

Please remember the following when you use functions that affect the

configuration of the mode alongside PROFINET IO (FB55; Primary Setup Tool,

STEP 7, NCM Diagnostics):

Notice

These functions can influence operation with PROFINET IO to such an extent that

an interruption of the cyclic I/O data exchange of the PROFINET IO devices

lasting several seconds may result.

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